Spectroscopic visualization of vortex flows using dye-containing nanofibers

Akihiko Tsuda, Md Akhtarul Alam, Takayuki Harada, Tatsuya Yamaguchi, Noriyuki Ishii, Takuzo Aida

Research output: Contribution to journalArticlepeer-review

207 Citations (Scopus)


Which way around? A J-aggregated zinc porphyrin dendrimer can be used to detect the macroscopic chirality of a vortex. The sign of the circular dichroism response changes quickly upon switching from clockwise (CW) to counterclockwise (CCW) stirring (see picture). The observed chiroptical activity most likely arises from a macroscopic helical alignment of nanofibers formed from the polymeric J-aggregate. (Chemical Equation Presented).

Original languageEnglish
Pages (from-to)8198-8202
Number of pages5
JournalAngewandte Chemie - International Edition
Issue number43
Publication statusPublished - 2007
Externally publishedYes


  • Chirality
  • Circular dichroism
  • Dendrimers
  • Porphyrinoids
  • Vortices

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


Dive into the research topics of 'Spectroscopic visualization of vortex flows using dye-containing nanofibers'. Together they form a unique fingerprint.

Cite this